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(17) INFRARED RAY MARK
The short red line on one side of the datum mark is
the infrared ray mark, which is used to correct the
focusing when using infrared film and filters. The
infrared ray has a longer wave length than the
visible light range, therefore, the focusing is displaced
being indicated by a short red line.
Infrared Photography
1. Attach an infrared filter to the camera.
2. Focus the lens using the red line.
3. Set the exposure according to the description on
the film and release the shutter.
It is probably impossible to focus the camera
with the infrared filter in position. Either focus with
the filter removed and then replace it or use the
distance scale.
(18) CHANGING AND REMOVING THE LENS
Depress the lens release button and turn the lens
counter-clockwise until it stops. The lens will now
move freely from the body.
Fitting the lens
Match the red point on the camera body with the red
point on the lens barrel. Fit the lens to the camera
and turn it counter-clockwise until it locks into position
The Bayonet Mount
Your Cosina CT-10/CT-20 camera is equipped with a
I
bayonet mount and will except all lenses with this fittini
ENGLISH
Fig.30
\'W
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